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Francisco

@ Francisco @lemmy.world

Posts
1
Comments
23
Joined
3 yr. ago

  • Central heating: is there any good way?

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  • Having seen this webpage https://www.draytoncontrols.co.uk/news/opentherm-explained , which kind of modulation do you have? Long boiler runs are not always bad.

    Also, are you able to use the living room TRVs to restrict the livingroom radiators heat output while keeping what you have set as the main setpoint, in the use case you detailed. That would avoid having the main thermostat triggered off too soon.

  • Central heating: is there any good way?

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  • I'm really confused by your post. The questions don't seem to match eachother's. I feel you have not made clear the specific use case you're troubleshooting.

    I am an inexperienced knob on Homeassistant and home automation, that lurks here out of curiosity and to catch some easy crumbs left around.

    But, I feel that I know enough about central heating, radiators and thermostats to justify commenting.

    The central heating boilers, pretty much always, just work as on-off. With some internal (boiler) logic on safety limits, like the working temp of the radiator fluid.

    Thus your obvious question has an obvious answer. The way to have the main thermostat sending a heating request is to lower it's setpoint temp.

    At the same time, the TRVs are supposed to limit/moderate the lowness of the main thermostat setpoint, i.e., to moderate the way in which the main thermostat activates the boiler 'too soon'. And TRVs allow you to adjust the comfort of each room (as long as the main thermostat is already requiring the boiler to be on).

    As for the presence sensors. Radiators take a long time to heat a room. Like dozens of minutes. If the presence sensors work as their name suggests, I feel they are not a good match with radiators. Plz teach me!! How do these work? What happens when you are sleeping, or when siting, reading, or watching TV, or in the computer.

    "I've heard about central heating systems not enjoying a fully thermostatic valved circuit."

    'Enjoy'? Ehh, the pump (usually a part of the boiler) and the tubing that make the radiator's fluid circulate, from the boiler around the house and around the radiators, they are not contructed/designed to have the circuit closed. 100% closed. Thus the recomendation not to put TRVs in all radiators - which could potentially all close off at the same time and damage the circuit (with overpressure). The recommendation is to have at least one radiator with it's manual valve always open. The recommendation is also improved to have this radiator in the bottom of the house or the closest to the boiler, instead of a radiator in the top floor bathroom where you've left open the window to let out the moisture or something.

    Again, what is it really what you want to solve?

  • ‘I have to do it’: Why one of the world’s most brilliant AI scientists left the US for China

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  • Money, I'm going to bet it's money.

  • Understanding six “key truths” about climate change predicts policy support, discussion, and political advocacy

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  • The linked article has a dedicated section «1.3.6 Key truth #6: ‘There’s hope’».

    I believe you are wrong because you are inconsiderate to the OP and to the other readers, by commenting before reading the linked article.

    I believe you are wrong because you moan before doing your (very small and straight foward) part.

  • Now that a genetic disease has been fixed with CRSPR we have a duty to iraducate all physically harmful genetic diseases

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  • You haven't addressed a key point on this discussion. Which tells me that either you don't know what you're writing about -- likely! -- or you're pulling a red herring.

  • Newpipe @lemmy.ml
    Francisco @lemmy.world

    YAYNW - yet again youtube not working

  • Found this on Mastadon, thought it would be worth sharing!

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  • Mastodon

    Mastodon

  • Scientists Took Semen Onto A "Vomit Comet" Flight, And The Results Were Concerning

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  • After sparing this paper a fair bit of attention I feel I've wasted it.

    Nowhere in the paper could i find in what conditions the test samples were kept during the experiment. This is pretty basic stuff. At this stage I'd wage sloshing was the issue.

    Reading this part of the methodology:

    "2.2 Initial sperm analysis

    After liquefaction...

    [Two paragraphs later, in the same section: ] After this first analysis, the 15 sperm samples were split into two fractions. All the samples were exposed to 'Parabolic flight' (split 1) and to..."

    Did they liquefied the samples and tested like that? Whaa?

    The "After this first analysis" should not be in the "2.2 Initial sperm analysis". It just shouldn't!

    Then I think "15 sperm samples were split into two fractions". ... "the samples were exposed to 'Parabolic flight' (split 1)" --- splits, fractions, what a mess!! At this stage I've wasted enough.

    The paper should be retracted, the reviewers spanked and the editor fired.

  • Austrian surgeon 'let teenage daughter drill hole in patient's skull'

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  • Thanks for the thoughtful answer!

  • Austrian surgeon 'let teenage daughter drill hole in patient's skull'

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  • I too like to partake into cynical sarcastic self loathing , at times.

    And I do like the layered ambiguity to whom your comment is addressed.

  • Austrian surgeon 'let teenage daughter drill hole in patient's skull'

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  • Sounds like you just want an snswer.

  • Austrian surgeon 'let teenage daughter drill hole in patient's skull'

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  • Well, I'm not a brain surgeon. So, I don't take myself as qualified to make that risk assessment. I agree that all you said up to 'without consent' is a very reasonable starting point to think about it, the answer to it should be made by whomever is qualified to answer it.

    As for consent, no pacirnt gives direct consent to who's in/helping the surgery besides the head surgeon. Why do you claim its need in this case?

  • Austrian surgeon 'let teenage daughter drill hole in patient's skull'

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  • I don't understand either if this is even a problem.

  • Hyperosmolal vaginal lubricants markedly reduce epithelial barrier properties in a three-dimensional vaginal epithelium model

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  • Abstract

    Most of the widely used vaginal lubricants in the U.S. and Europe are strongly hyperosmolal, formulated with high concentrations of glycerol, propylene glycol, polyquaternary compounds or other ingredients that make these lubricants 4 to 30 times the osmolality of healthy vaginal fluid. Hyperosmolal formulations have been shown to cause marked toxicity to human colorectal epithelia in vivo, and significantly increase vaginal transmission of genital herpes infections in the mouse/HSV model. They also cause toxicity to explants of vaginal epithelia, to cultured vaginal epithelial cells, and increase susceptibility to HIV in target cells in cell cultures. Here, we report that the osmolality of healthy vaginal fluid is 370 ± 40 mOsm/Kg in women with Nugent scores 0–3, and that a well-characterized three-dimensional human vaginal epithelium tissue model demonstrated that vaginal lubricants with osmolality greater than 4 times that of vaginal fluid (>1500 mOsm/Kg) markedly reduce epithelial barrier properties and showed damage in tissue structure. Four out of four such lubricants caused disruption in the parabasal and basal layers of cells as observed by histological analysis and reduced barrier integrity as measured by trans-epithelial electrical resistance (TEER). No epithelial damage to these layers was observed for hypo- and iso-osmolal lubricants with osmolality of <400 mOsm/Kg. The results confirm extensive reports of safety concerns of hyperosmolal lubricants and suggest the usefulness of reconstructed in vitro vaginal tissue models for assessing safety of lubricants in the absence of direct clinical tests in humans.

  • Nuclear too slow to replace coal, and baseload “simply can’t compete” with wind and solar, AEMO boss says

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  • Can Nuclear plant electricity production be run in a decentralised way? No?! Not yet!?

    Do we have alternatives to nuclear? Yes!?

    We should avoid nuclear then.

  • Train passengers face price hikes and fewer seats after HS2 cancellation

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  • They are just serving those who can claim back the ticket money. Mostly, you know, those that use your money to pay those tickets.

  • What am I dealing with?

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  • From my past reading on tomato plants, they don't really like temperatures above 88 degF. They'll not be happy at 100. Maybe, can you shade them?

  • Tens of thousands march on Washington to demand ceasefire in Gaza

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  • “Who would have known that the mighty people of Yemen would challenge the empires of the world,” he added, referring to the Houthi attacks on international shipping in the Red Sea that have led to two nights of retaliatory strikes by the US and UK.

    This does not sound like somebody interested in promoting peace.

  • Desalination system could produce freshwater that is cheaper than tap water

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  • It is explained in the link.

    A hint, just after the title: "MIT engineers and collaborators developed a solar-powered device that avoids salt-clogging issues of other designs."

  • Mysterious ways of gods.

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  • Both think of the children